Question

the perimeter of each face of cubeis 20cm. find its lateral surface area?

Answer 1

Perimeter of side of a cube = perimeter of a square
4 x side = 20 cm
side = 20/4 = 5 cm

L.S.A of a cube = 4a² = 4 x 5² = 4 x 25 = 100cm²

Answer 2

QUESTION :-

the perimeter of each face of cubeis 20cm. find its lateral surface area?

ANSWER:-

Perimeter of each face of the cube → 20 cm

4 × Edge of the cube = 20 cm

Edge of the cube =

$→ \frac{20}{4} cm$

→ 5 cm

Lateral surface area

→ 4 × ( Edge )²

→ 4 × ( 5 cm )²

→ (4 × 25) cm²

→ 100 cm²